wavelength

noun

wave·​length ˈwāv-ˌleŋ(k)th 

1

: the distance in the line of advance of a wave from any one point to the next point of corresponding phase

2

: a particular course or line of thought especially as related to mutual understanding

two people on different wavelengths

Examples of wavelength in a Sentence

Light and sound have different wavelengths.

Recent Examples on the Web

The longest wavelengths appear red, while the shorter wavelengths are blue or purple. —Rebecca Sohn, Space.com, 16 Jan. 2025

Having been itching for some neighbors more along their wavelength, cop Danny (Scotsman Sam Heughan trying very hard to disguise his native accent), and yoga instructor Becka (Australian Jessica De Gouw allowed to use her own) waste little time in introducing themselves. —Jon O'Brien, IndieWire, 16 Jan. 2025

The point, for those on Stan’s wavelength, was taken. —Daniel D'addario, Variety, 6 Jan. 2025

These avenues transport red and blue light—the best wavelengths for photosynthesis—into the shell while blocking harmful ultraviolet radiation. —Carlyn Kranking, Smithsonian Magazine, 31 Dec. 2024

Word History

First Known Use

1850, in the meaning defined at sense 1

Kids Definition

wavelength

noun

wave·​length ˈwāv-ˌleŋ(k)th 

1

: the distance (as from crest to crest) in the line of advance of a wave from any one point to the next corresponding point

2

: a certain line of thought or behavior that reveals a common understanding

coworkers who are on the same wavelength

Medical Definition

wavelength

noun

wave·​length -ˌleŋ(k)th 

: the distance in the line of advance of a wave from any one point to the next point of corresponding phase

—symbol λ